Protection device for in-mold decoration and method thereof

Abstract

The invention provides a device and a method for protecting the injection molding of an insertion piece inside a mold. The device comprises an adhesive disc, a vacuum degree adjusting device, a pressure switch and a control circuit; the adhesive disc is used for adsorbing the insertion piece; the vacuum degree adjusting device is used for adjusting vacuum degree between the adhesive disc and the insertion piece; the pressure switch is used for detecting the vacuum degree between the adhesive disc and the insertion piece and outputting an insertion piece in-place signal to the control circuit according to the vacuum degree; and the control circuit is used for receiving a thimble ejection confirming signal, a mold closing signal and the insertion piece in-place signal, adjusting the vacuum degree between the adhesive disc and the insertion piece through the control of the vacuum degree adjusting device according to the thimble ejection confirming signal and controlling whether the mold closing signal is output or not according to the insertion piece in-place signal. With the device and the method for protecting the injection molding of the insertion piece inside the mold, the adhesive disc adsorbs the insertion piece according to a signal received by an injection molding machine; the injection molding machine carries out the mold closing process only when the insertion piece is judged to be in place; and the method and the device have the advantages of low cost, small interference and high stability.

Description

technical field [0001] The present invention relates to injection molds, more particularly to a protection device and method for injection molding of in-mold inserts. Background technique [0002] Injection molding refers to the method of heating the resin to a molten state, injecting it into a mold with the desired shape at high speed and high pressure, and opening the mold after cooling to obtain a molded product. With the continuous improvement of the performance of plastic raw materials, the process of substituting plastic for steel and wood for parts in various industries will be further accelerated, and the proportion of using plastic molds will increase day by day, especially the in-mold insert molding (IMD) process has become more and more It is more and more widely used in the electronic communication industry, home appliance industry and other industries. During the operation of the in-mold insert injection molding process, the position of the insert must be monito...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of poor stability and high cost of the device used for monitoring and protecting the injection molding process of the in-mold insert in the prior art, the present invention provides a protection device for the injection molding of the in-mold insert. The protection device has Advantages of low cost, high reliability and high stability

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